The use of the word rank for Navy enlisted personnel is incorrect. The term is rate.. The rating badge is a combination of rate (pay grade, as indicated by the chevrons) and rating (occupational specialty, as indicated by the symbol just above the chevrons).
Neurons are nerve cells that are constantly sending signals to your brain, muscles and glands. You have over 100 billion neurons in your brain sending signals. The signals help the different parts of your body communicate with each other.
Basically, acetylcholine is the neurotransmitter or chemical messenger that the nerve cell uses to communicate with the muscle cell. The result of this communication is electrical excitation of the muscle cell, what we call an action potential.The action potential of the muscle cell activates that muscle and causes the muscle cell to contract or shorten.he result of this communication is electrical excitation of the muscle cell, what we call an action potential. The action potential of the muscle cell activates that muscle and causes the muscle cell to contract or shorten.